Tesla Releases FSD v12.4: New Vision Attention Monitoring, Improved Strike System With Update 2024.9.5

By Not a Tesla App Staff
Tesla reduces the need for the steering wheel nag with FSD v12.4
Tesla reduces the need for the steering wheel nag with FSD v12.4
Not a Tesla App

Tesla has just rolled out its latest FSD software, v12.4 to employees. Elon Musk announced that this update would be available to employees this past weekend, with plans to release it to the public in small numbers later this week.

Surprisingly, the new update is version 2024.9.5, which is likely based on the earlier 2024.8 branch and not Tesla's latest 2024.14. The spring update (2024.14) brings various new features such as a new media player, a new parked visualization, Audible support, and a Preview of Sentry Mode events, among others.

However, FSD v12.4 brings its own excitement with two new major changes.

Vision-Based Attention Monitoring

The release notes show a new Vision-Based Attention Monitoring feature that replaces the steering wheel nag as Musk previously mentioned.

However, as we predicted, Tesla will still leverage the steering wheel to detect attentiveness when the cabin camera is inconclusive.

The car can only rely on the vehicle's cabin camera, and therefore remove the steering wheel nag under certain conditions:

  • the camera is not occluded

  • there is sufficient lighting

  • the driver is looking forward

  • the driver is not wearing sunglasses

  • the driver is not wearing a low-brim hat or another object that covers their eyes

If any of these situations occur, or if the vehicle doesn't have a cabin camera, then the vehicle will continue to use the steering wheel to determine driver attention.

Tesla is careful to state that images and video from the cabin camera are not saved or transmitted unless you enable data sharing.

Updated Strike System

With FSD v12.4, Tesla has also updated its Autopilot Suspension feature which is designed to enforce the responsible use of FSD.

The current system lets the driver receive up to five strikes (three strikes for vehicles without a cabin camera) before Autopilot and FSD become unavailable. If that happens, then FSD is unavailable for one week. Strikes are only removed once the driver has accrued five strikes, or when Tesla wipes out strikes for everyone, which happens about twice a year.

The new system is more gracious about removing strikes. The vehicle will continue to issue strikes whenever the driver isn't paying attention, however, now the vehicle will gradually remove strikes for the driver after a certain period of time.

Tesla states that one strike will be removed for each 7-day period the driver goes without receiving a strike. So if FSD gets disabled due to strikes, the driver will still go one week without FSD, although now strikes are removed on an ongoing basis. This new strike system is expected to apply to vehicles with and without a cabin camera.

Other New Features

Other new features are expected in FSD 12.4 as well, which we outlined in our look at Tesla's FSD v12.4 article.

They include a focus on improved driver comfort by reducing the amount of hard braking, automatically seeking a parking spot when arriving at a destination and more. Driver interventions are also expected to be drastically reduced with Musk stating that Tesla expects to see a 5-10x improvement in interventions.

Eligibility

Unfortunately, due to FSD v12.4 being on branch 2024.9, it's expected to only be available to owners on update 2024.8 and below, which includes everyone currently on update 2024.3.25.

If no major issues are found with FSD v12.4, we could see it start to roll out to the public later this week.

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Tesla LFP Batteries Can Now Be Warmed up While Supercharging Using Innovative Feature

By Karan Singh
Not a Tesla App

Tesla’s been on a roll with Supercharger improvements lately, from the 325kW charging update for the Cybertruck, to 500kW with V4 Superchargers coming next year. While those improvements have been limited to the Cybertruck, Tesla didn’t put all their focus on their new flagship vehicle, but looked at their more affordable vehicles as well.

LFP Battery Heating

Tesla’s Superchargers can now heat LFP Batteries - those that are in the Model 3 and Model Y Rear Wheel Drive variants. This applies to Long Range and Standard Range models, which saw a limited run. This is another update included as part of the 2024 Tesla Holiday Update - which really arrived with a lot of unannounced new features and capabilities.

The change is pretty interesting - Superchargers of the V3 and V4 variety can now pre-heat batteries for Model 3 and Model Y vehicles equipped with LFP battery packs. That means those vehicles are able to get back on the road faster when it's extremely cold. Of course, Tesla still advises you to precondition before you arrive, saving drivers time and money.

Max de Zegher, Tesla’s Director of Charging, also commented on the new feature. Essentially, Tesla is inducing an AC (alternating) ripple current through the battery to warm it up. Keep in mind that Superchargers are DC charging. That means it is possible to get a cold-soaked LFP vehicle on the road 4x faster than before, assuming that it didn’t precondition at all and that it is in the worst-case scenario (below 0ºF).

In essence, Tesla is using some engineering magic to turn the circuits inside the LFP battery into an electric heater - and powering that heater through the Supercharger. An AC ripple current is a small oscillation in the DC charging current that generates heat through electrical resistance, warming up the battery. Those ripples are a byproduct of converting AC to DC and back - so Tesla is using the onboard charger to induce those ripples to warm up the battery. Definitely an innovative technique that’s really only possible with the versatility of the NACS connector.

We’re hoping Tesla can implement this across their full lineup of vehicles, but we’ll have to wait and see how it is trialed across LFP vehicles first and if it is even possible on vehicles with 2170 or 4680 battery packs.

Tesla Included FSD V12.6.1 and V13.2.4 in the Same Update: What Caused This and What It Means

By Karan Singh
Not a Tesla App

Tesla launched two FSD updates simultaneously on Saturday night, and what’s most interesting is that they arrived on the same software version. We’ll dig into that a little later, but for now, there’s good news for everyone. For Hardware 3 owners, FSD V12.6.1 is launching to all vehicles, including the Model 3 and Model Y. For AI4 owners, FSD V13.2.4 is launching, starting with the Cybertruck.

FSD V13.2.4

A new V13 build is now rolling out to the Cybertruck and is expected to arrive for the rest of the AI4 fleet soon. However, this build seems to be focused on bug fixes. There are no changes to the release notes for the Cybertruck with this release, and it’s unlikely to feature any changes when it arrives on other vehicles.

While this update focuses on bug fixes, Tesla’s already working on bigger features for FSD V13.3, which we have already confirmed to include improvements to highway following and speed control.

FSD V12.6.1

FSD V12.6.1 builds upon V12.6, which is the latest FSD version for HW3 vehicles. While FSD V12.6 was only released for the redesigned Model S and Model X with HW3, FSD V12.6.1 is adding support for the Model 3 and Model Y.

While this is only a bug-fix release for users coming from FSD V12.6, it includes massive improvements for anyone coming from an older FSD version. Two of the biggest changes are the new end-to-end highway stack that now utilizes FSD V12 for highway driving and a redesigned controller that allows FSD to drive “V13” smooth.

It also adds speed profiles, earlier lane changes, and more. You can read our in-depth look at all the changes in FSD V12.6.

Same Update, Multiple FSD Builds

What’s interesting about this software version is that it “includes" two FSD updates, V12.6.1 for HW3 and V13.2.4 for HW4 vehicles. While this is interesting, it’s less special when you understand what’s happening under the hood.

The vehicle’s firmware and Autopilot firmware are actually completely separate. While a vehicle downloading a firmware update may look like a singular process, it’s actually performing several functions during this period. First, it downloads the vehicle’s firmware. Upon unpacking the update, it’s instructed which Autopilot/FSD firmware should be downloaded.

While the FSD firmware is separate, the vehicle can’t download any FSD update. The FSD version is hard-coded in the vehicle’s firmware that was just downloaded. This helps Tesla keep the infotainment and Autopilot firmware tightly coupled, leading to fewer issues.

What we’re seeing here is that HW3 vehicles are being told to download one FSD version, while HW4 vehicles are being told to download a different version.

While this is the first time Tesla has had two FSD versions tied to the same vehicle software version, the process hasn’t actually changed, and what we’re seeing won’t lead to faster FSD updates or the ability to download FSD separately. What we’re seeing is the direct result of the divergence of HW3 and HW4.

While HW3/4 remained basically on the same FSD version until recently, it is now necessary to deploy different versions for the two platforms. We expect this to be the norm going forward, where HW3 will be on a much different version of FSD than HW4. While each update may not include two different FSD versions going forward, we may see it occasionally, depending on which features Autopilot is dependent on.

Thanks to Greentheonly for helping us understand what happened with this release and for the insight into Tesla’s processes.

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